855606559 has 4 divisors (see below), whose sum is σ = 855665416. Its totient is φ = 855547704.

The previous prime is 855606547. The next prime is 855606569. The reversal of 855606559 is 955606558.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 855606559 - 2⁷ = 855606431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855606529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9877 + ... + 42529.

It is an arithmetic number, because the mean of its divisors is an integer number (213916354).

Almost surely, 2^855606559 is an apocalyptic number.

855606559 is a deficient number, since it is larger than the sum of its proper divisors (58857).

855606559 is a wasteful number, since it uses less digits than its factorization.

855606559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58856.

The product of its (nonzero) digits is 1620000, while the sum is 49.

The square root of 855606559 is about 29250.7531356032. The cubic root of 855606559 is about 949.3463866037.

Subtracting 855606559 from its reverse (955606558), we obtain a palindrome (99999999).

The spelling of 855606559 in words is "eight hundred fifty-five million, six hundred six thousand, five hundred fifty-nine".